Abstract:
A multi-layer printed circuit board has a number of landing pads that are configured to engage a connector secured thereto. Between the landing pads associated with different signals is at least one micro via that is electrically connected to a ground plane on an outer surface of the multi-layer printed circuit board, and a ground plane on an inner layer of the multi-layer printed circuit board.
Abstract:
A blind-mate capacitive coupling interconnection between a main module enclosure one or more sub-module enclosures has coupling surfaces each with a ground portion and an aperture, an inner element provided in the aperture, spaced away from the ground portion. The coupling surfaces may be provided, for example, as traces on a printed circuit board. To accommodate a degree of mis-alignment, one of the inner elements may be provided larger than the other. Capacitive coupling between the coupling surfaces occurs when the coupling surfaces are mated together, retained in position, for example, by a mechanical fixture.
Abstract:
Methods and apparatus relating to self-referencing pins are described. In one embodiment, a pin electrically couples a first agent to a second agent. The pin includes two or more portions that are at least partially separated by an insulator, e.g., to improve crosstalk performance. Other embodiments are also disclosed and claimed.
Abstract:
A multi-layer circuit member includes first and second electrically connected reference regions. At least a portion of a signal conductor is in proximity to the first region and a circuit component is in proximity to the second region. An area of increased impedance exists between the first and second electrically connected regions.
Abstract:
A hybrid assembly having improved cross talk characteristics comprises a substrate (101) having an upper surface (111). Conductive paths on the upper surface are provided for conducting high frequency signals. Regular polygons (501, 503) made of an electromagnetic band gap (EBG) material having slow wave characteristics are 5 deposited on the upper surface and form a lattice for tessellating the upper surface. Each of the polygons has a periphery. The polygons are separated along their periphery from adjacent polygons by an interspace and are covered with an insulating material. Second polygons (804,808), also made of an electromagnetic band gap material, are deposited over the insulating material. Vias (828) connect second polygons 10 to ground plane(307). Semiconductor structures (404,406) are mounted over the second polygons. The semiconductor structures have a plurality of electrical contacts with the conductive paths. The regular polygons can be hexagons, triangles, octagons or any other combination that forms a lattice and can be printed onto the substrate.
Abstract:
A hybrid assembly having improved cross talk characteristics comprises an electromagnetic band gap (EBG) layer (612) on a substrate (101) having an upper surface (111) and a lower surface and a semiconductor structure (MMIC) (602) mounted above teh EBG layer. A plurality of stars (400,402) made of an EBG material are preferably printed, or deposited, on the upper surface (111). The EBG material has slow wave characteristics. The plurality of stars teeellates the upper surface between conductive paths. Each of the stars has a center section (408) formed from a regular polygon, the center section having projections extending from the center section. The projections and the center section form a periphery. The periphery engages adjacent stars along the periphery. Stars are separated from adjacent starts by an interspace. Each of the stars is connected to a conductive via (604, 606), in turn connected to ground potential. A conductive layer (307) at ground potential is electrically continuous with vias (604, 606) used to interconnect all stars forming the EBG layer.
Abstract:
A system and/or method for sensing the presence of moisture (e.g., rain) and/or other material(s) on a window such as a vehicle window (e.g., vehicle windshield, sunroof or backlite). In certain example embodiments, a plurality of sensing capacitors are supported by a window such as a vehicle windshield, the capacitors each having a different field and/or pattern. A sensing circuit outputs an analog signal that is based on and/or related to the capacitances of one or more of the sensing capacitors. In certain example embodiments, a flexible printed circuit board (PCB) mountable in or on a vehicle window is provided. First and second sensing circuits are formed on opposing sides of the flexible PCB, with each said sensing circuit comprising a plurality of different fractal structures. A ground plane is located between the first and second sensing circuits, with the ground plane being arranged so as to decouple the first and second capacitor arrays and to shield the first capacitor array from fields emanating from the second capacitor array and vice versa. The electronic device is configured to detect moisture on an exterior surface of the vehicle window, humidity on an interior surface of the vehicle window, and EMI.
Abstract:
The invention relates to an electric multilayer printed circuit board which satisfies the PICMG specification EXP.O, comprising a first signal layer and a second signal layer. The first signal layer comprises at least one first conductive path (33) and a first shielding region. The second signal layer comprises at least one second conductive path (43) and a second shielding region. The at least one first conductive path (33) and the at least one second conductive path (34) can be arranged such that said paths cross in at least one crossing point K. The first conductive path (33) is arranged adjacently to the second shielding region at each point where the first conductive path does not cross a second conductive path (43), and each second conductive path (43) is arranged adjacently to the first shielding region at each point where the second conductive path does not cross a conductive path (33).
Abstract:
A hybrid assembly having improved cross talk characteristics includes a substrate having an upper surface. Conductive paths on the upper surface are provided for conducting high frequency signals. Regular polygons made of an electromagnetic band gap (EBG) material having slow wave characteristics are deposited on the upper surface and form a lattice for tessellating the upper surface. Each of the polygons has a periphery. The polygons are separated along their periphery from adjacent polygons by an interspace and are covered with an insulating material. Second polygons, also made of an electromagnetic band gap material, are deposited over the insulating material. Semiconductor structures are mounted over the second polygons. The semiconductor structures have a plurality of electrical contacts with the conductive paths. The regular polygons can be hexagons, triangles, octagons or any other combination that forms a lattice and can be printed onto the substrate.